They charge for an additional driver, even a spouse.
They can cancel your reservation if an error allowed you to reserve a car at a rate not intended.
They can cancel your reservation if you're more than an hour late, unless you call, even if your flight is delayed. Your personal auto policy better cover rental cars. They don't accept cc as offering third party liability since most don't include it.
Debit renters who have personal auto insurance have to pay $10 per day to insure a $500 deductible.